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An ESA Discovery & Preparation study explored how lunar regolith – the dust, soil and rock on the Moon’s surface – could be used to store heat and provide electricity for future astronauts, rovers and landers.
The study involved creating an artificial regolith brick; such bricks could offer a way of storing daytime solar energy so that electricity can be produced at night.
The brick measures 14 x 8.5 x 5 centimetres, making it a bit smaller than a typical brick used to build a house.
Read more here.